Islands



(No Model.) I

- W. BREDE.

RATGHET DRILL.

atejnte d Jan. 22, 1884.

. WITNESSES: INVENTOR:

/Jm m' /m w v BY ATTORNEYS.

N. PETER; Phnto-Lithngnpher, wasi\ingim 0.1:.

Urvrrm'). STATES PATE T trier-i WVILLIAM BREDE, OE HONOLULU, I-IAWVAIIANISLANDS.

RATCHET-DRILL.

SPECIFICATION forming part of Letters Patent No. 292,280, dated-January22, l8i4,

Application filed March 21, 1883. (No model.)

To all whom it may concern:

Be it known that I, WILLIAM BREDE, of Honolulu, Oahu, Hawaiian Islands,have invented a new and Improved Ratchet-Drill, of which the followingis a full, clear, and exact description. i

In my improved ratchet-drill'a continuous rotary motion of the drill canbe obtained by a forward and backward movementof the lever of theratchet, and the drill fed automatically at the same time, where bydrilling can be done quickly and readily.

The invention consists in a combination of bevel-gearing and ratchetmechanism for 01)- 1 5 crating the drill and effecting the feed, ashereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is a sideelevation of my improved brace. Fig. 2 is alongitudinal section of the same, and Fig. 3 is a cross-section on lineto m of Fig. 1. Fig. 4 is a detail sectional view, showing the positionof the slide and a sectional view of the cam.

A is the frame, formed with an upper bearing, Z, and lower bearing, Z,connected by a side arm.

0 is the spindle,extending through thelower bearing, Z, and into theupper bearing, Z.

J is a screw-stem fitted looselyin the upper bearing, Z, and extendingat its lower end into the spindle O, which is formed hollow to receivethe stem. The screw-stem is prevented from turning by a feather, w, onthe spindle entering'a slot, w, formed in the screw.

On the screw, above frame A, is aloose collar, M, beneath a nut, L, thatis formed with ratchet-teeth on its under side.

m is apawl fitted in a recess in collar M, and forced upward by a springinto engagement with the teeth on nut L.

n is a thumb-piece for depressing the pawl to allow backward movement ofthe nut.

Fixed on spindle 0, above bearing Z, is a bevel-pinion, D, anda-ratchet-wheel, a, that 'is fast on the hub of thepinion.

E is a bevel-pinion loose on the spindle,and

having a'ratchet-wheel, a, on its hub, and-on the spindle between theratchetwheels is hung the operating-lever B, provided with pawls b b,engaging ratchetwheels a a, the teeth of which are in reverse.

F is a bevel-pinion fitted loosely, as shown in Fig. 2 of the drawings,in the frame A, so as to engage the pinions D E. The upper side ofpinion E is notched or toothed to form a cam, E, and on frame A is aslide, H, having its lower end engaging the cam of the pinion, while itsupper end is made with an inclined slot, 8, engaging a pin, t,projecting from col- 7 lar M.

I is a camsleeve loose on frame A, supporting the slide H by a pin, a,projecting from the slide over the sleeve I, so that by turning thesleeve the slide will be raised and lowered, and its length of movementby the cam thus regulated. A spring, 0, in a groove around the frame Abears on a pin, a, projecting from the slide, for the purpose of keepingthe slide down.

' In the operation of the drill, lever B being moved .in one direction,one pawl, 72, acting on ratchet-wheel a, rotates pinion E, and themotion is transmitted through pinions F D to spindle O. The lever, on itsreturn movement, acts by pawl 11 on ratchet a, thereby further rotatingpinion D, and keeping up the movement of spindle O in the same directionas before.

In the movement of pinion E .its cam-hub causes the rise of slide H,more or less continuously, and a greater or less distance, according toadjustment of sleeve I, thereby moving collar M and causing movement ofnut L, so that the screw J is forced up at each rise of the slide.The'return movement of the collar M is caused byspring e. I

The upper end of screw J is squared to re- 0 ceive a concave cap, K, forholding the drill, and the cap is formed with points toprevent itsrevolving while drilling.

Having thus, described my invention, what I claim as new, and desire tosecure by Letters 5 Patent, is-.

1. In ratchet drills, the combination of campinion. E, slide H, collarM, nut L, and screw J, substantially as shown and described.

2. In ratchet-drills, the cam-sleeve I, combined with slide H,cam-pinion- E, and collar I ment in ratchet-drill brace signed by methis M, substantiallyns and for the purpose specified.

3. In rateheodrills, the spring 0, combined I 5 with feed-s1ide H,having a pin thereon, and cam-pinion E, asand for the purpose specified.

The foregoing specification ofmy improve 17 1h day of February, 1883.

XVILLIAM BR EDE.

\v'itnesses:

(1'; 0. COLEMAN, \V. E. IIER'RICK.

